A display device capable of improving the view angle characteristics without deteriorating the outside light contrast and a display unit using it are provided. The display device includes a first electrode, an organic layer including a light emitting lay and a second electrode sequentially over a substrate, and having a resonator structure in which light generated in the light emitting layer is resonated between a first end and a second end. An end face of the first electrode on the light emitting layer side is the first end having a step shape. A distance adjustment layer that fills in the step shape and has a flat surface on the second electrode side is provided between the first electrode and the second electrode, and thereby the second end is planarized, and an optical distance between the first end and the second end is varied according to the step shape.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A light emitting device comprising: a substrate; a layer having a convexoconcave surface and disposed on the substrate such that the convexoconcave surface faces away from the substrate, the convexoconcave surface having a continuous convexoconcave shape with arcuate convex and concave segments; a first electrode on the convexoconcave surface and conforming thereto so as to have a first electrode surface having the continuous convexoconcave shape and facing away from the substrate; a distance adjustment layer that covers the first electrode, the distance adjustment layer having (i) a first surface that has the continuous convexoconcave shape and contacts the first electrode and (ii) a second surface that is flat and faces away from the first electrode; an organic layer on the distance adjustment layer, the organic layer including a light emitting layer and at least a hole injection layer, the hole injection layer being in contact with the second surface of the distance adjustment layer, and the organic layer being planar over the extent of the first electrode surface; and a second electrode on the organic layer, the second electrode having a second electrode surface that faces the organic layer and is planarized, wherein, the light emitting device has a resonator structure in which light generated in the light emitting layer is resonated between a first end and a second end, the first electrode surface being the first end and the second electrode surface being the second end, and the light being emitted via the second electrode, and an optical distance between the first end and the second end continuously varies according to the continuous convexoconcave shape of the first end.
2. The light emitting device of claim 1 , further comprising: a color filter over the second electrode.
3. The light emitting device of claim 1 , wherein the organic layer further includes a hole transport layer and an electron transport layer, the hole injection layer, the hole transport layer, the light emitting layer, and the electron transport layer being stacked in that order from the distance adjustment layer.
4. The light emitting device of claim 1 , wherein the layer having the convexoconcave surface is made of a photosensitive resin.
5. The light emitting device of claim 1 , wherein a material from which the distance adjustment layer is made is the same as a material from which one of the layers of the organic layer is made.
6. A display unit comprising: a light emitting device, the light emitting device including (a) a substrate; (b) a layer having a convexoconcave surface and disposed on the substrate such that the convexoconcave surface faces away from the substrate, the convexoconcave surface having a continuous convexoconcave shape with arcuate convex and concave segments; (c) a first electrode on the convexoconcave surface and conforming thereto so as to have a first electrode surface having the continuous convexoconcave shape and facing away from the substrate; (d) a distance adjustment layer that covers the first electrode, the distance adjustment layer having (i) a first surface that has the continuous convexoconcave shape and contacts the first electrode and (ii) a second surface that is flat and faces away from the first electrode; (e) an organic layer on the distance adjustment layer, the organic layer including a light emitting layer and at least a hole injection layer, the hole injection layer being in contact with the second surface of the distance adjustment layer, and the organic layer being planar over the extent of the first electrode surface; and (f) a second electrode on the organic layer, the second electrode having a second electrode surface that faces the organic layer and is planarized, wherein, the light emitting device has a resonator structure in which light generated in the light emitting layer is resonated between a first end and a second end, the first electrode surface being the first end and the second electrode surface being the second end, and the light being emitted via the second electrode, and an optical distance between the first end and the second end continuously varies according to the continuous convexoconcave shape of the first end.
7. The display unit of claim 6 , further comprising: a color filter over the second electrode.
8. The display unit of claim 6 , wherein the organic layer further includes a hole transport layer and an electron transport layer, the hole injection layer, the hole transport layer, the light emitting layer, and the electron transport layer being stacked in that order from the distance adjustment layer.
9. The display unit of claim 6 , wherein the layer having the convexoconcave surface is made of a photosensitive resin.
10. The display unit of claim 6 , wherein a material from which the distance adjustment layer is made is the same as a material from which one of the layers of the organic layer is made.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
February 1, 2007
February 5, 2013
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.